php中的魔术方法

php 中的魔术方法：

<?php
class cat{
    public function  __get($property)
    {
        return  $this->{$property};
    }
    
    public function __call($parm1,$parm2)
    {
        print_r($parm1);
        print_r($parm2);
    }
    public function __set($var,$val)
    {
            echo $var."|".$val."\r\n";
            $this->$var = $val;
    }
    public function __clone()
    {
        echo "clone func invoke"."\r\n";    
    }
    public function __isset($var)
    {
        echo "via __isset view isset".$var;
    }
    public function __unset($var)
    {
        echo "via __unset unset".$var;
    }
    public static function __callStatic($parm1,$parm2)
    {
        echo "__callStatic ".$parm1.var_dump($parm2);
    }
    public function __construct()
    {
        echo '__construct';
    }
    public function __destruct()
    {
        echo '__destruct';
    }
    public function __toString()
    {
        return  'cat to string';
    }
    public function __invoke($xxx)
    {
            var_dump($xxx);
    }
    
}
$Cat = new cat();
//echo $Cat->name;
//$Cat->hello($array=array('a','b'));

$Cat->a = 3;

$Cat2 = clone $Cat;
$Cat2->a = 10;
echo $Cat->a;
echo $Cat2->a;

var_dump(isset($Cat->b));
unset($Cat->b);
Cat::ddd('abc');
echo $Cat2;
$Cat('abccd');
var_dump(is_callable($Cat));

此外还有：

<?php
//student.class.php
class Student{
    private $full_name = '';
    private $score = 0;
    private $grades = array();
    
    public function __construct($full_name, $score, $grades)
    {
        $this->full_name = $full_name;
        $this->grades = $grades;
        $this->score = $score;
    }
    
    public function show()
    {
        echo $this->full_name;
    }
    
    function __sleep()
    {
        echo 'Going to sleep...';
        return array('full_name', 'grades', 'score');
    }
    
    function __wakeup()
    {
        echo 'Waking up...';
    }
}
?>

<?php
//a.php

$student = new Student('bla bla', 'a', array('a' => 90, 'b' => 100));
$student->show();
echo "<br />\n";
$s = serialize($student);
echo $s ."<br />\n";
$fp = fopen('./session.s', 'w');
fwrite($fp, $s);
fclose($fp);
?>

<?php
//b.php

$s = implode('', file("./session.s"));
echo $s ."<br />\n";
$a = unserialize($s);
$a->show();
?>

其中__invoke是5.3以后加入的。